CIVL2201 Lab Report 1 FINAL.docx - MATERIAL PROPERTIES OF...

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MATERIAL PROPERTIES OF STEEL AND CONCRETEREPORT FROM LABORATORY DEMONSTRATIONS ON 17 MARCH 2017AS PART OF THE UNIT OF STUDY CIVL2201 STRUCTURAL MECHANICSABSTRACTThis report describes a tension test on a steel coupon, and a compression test on a concrete cylinder. Theprimary objective of the tests was to obtain the stress-strain curves for the two materials. Both test methodsare described.It was found that the steel first exhibited elastic behaviour until the tensile load increased to 438 MPa, afterwhich it experienced plastic deformation. It had a yield stress of 438 MPa, an ultimate tensile strength of 562MPa, an elastic modulus of 213 GPa, and a uniform ultimate strain of 19%. The concrete had an ultimatestrength of 33.9 MPa, an elastic modulus of 33.3 GPa and a strain at failure of 0.236%.These results reveal the disparity in strength, stiffness and ductility of steel and concrete. When comparing thetensile strength of steel to the compressive strength of concrete, steel is the superior material in all qualities,having a much higher ultimate strength and strain at failure. In particular, steel is much more ductile, whileconcrete is brittle, with a very low strain at failure.
Material Properties of Steel and Concrete (CIVL2201 Structural Mechanics 2017)Table of ContentsABSTRACT.............................................................................................................................11Introduction......................................................................................................................32Test Method......................................................................................................................32.1Steel Tensile Coupon Test...................................................................................................32.2Concrete Cylinder Compression Test................................................................................43. Test Results........................................................................................................................53.1Steel Tensile Coupon Test...................................................................................................53.2Concrete Cylinder Compression Test................................................................................64Discussion........................................................................................................................75Conclusion.......................................................................................................................86References........................................................................................................................87Appendices.......................................................................................................................97/04/17Page 2
Material Properties of Steel and Concrete (CIVL2201 Structural Mechanics 2017)1INTRODUCTIONThe aim of this report is to describe tests to investigate the material properties of steel in tension and concretein compression, and in particular, present the stress-strain curves. These stress-strain curves contain vital information for engineers, as they present the maximum load amaterial may be subject to before yielding (if applicable), and ultimately failure. In particular, the yield stress(fyis a critical parameter as it determines the load to which members can be exposed before experiencingplastic, rather than elastic, deformations. The tensile and compressive strength (fu) is also important todetermine as it is used to calculate at what load the given material will fail. The materials that are examined inthis report are cold-formed steel sections and concrete. The information gathered is critical for understandingstructural mechanics, and selecting which materials are to be selected for different structures, as differentmembers will be subjected to certain loads. Knowledge of these properties permits engineers to choose themost economical and safest materials for any particular structure.

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